杏子川油田W区储层岩石学特征及敏感性损害程度  

Reservoir petrological characteristics and sensitivity damage degree of W area in Xingzichuan oilfield

作　　者：易居安 Yi Ju'an(Research Institute of Exploration and Development,Xingzichuan Oil Production Company of Yanchang Oil filed,Yan'an 717400)

机构地区：[1]延长油田杏子川采油厂勘探开发研究所,陕西延安717400

出　　处：《石化技术》2022年第10期134-137,242,共5页Petrochemical Industry Technology

摘　　要：本次研究基于区内长2和长6储层岩石学特征,对储层敏感性损害进行了定量评价。结果表明:研究区储层为中粒/细粒长石砂岩,胶结类型多为薄膜和孔隙型。孔隙类型主要为粒间孔,其次为粒内孔、铸模孔、长石溶孔等。长2储层为无速敏,中等偏强水敏,强盐敏,弱酸敏,无碱敏。长6储层为弱~中等偏强水敏,无盐敏,酸敏程度为改善-强酸敏,碱敏程度为无-中等偏弱碱敏,研究成果为研究区制定合理的储层保护技术对策提供了理论依据。In this study,based on petrological characteristics of Chang 2 and Chang 6 reservoir in the study area,the quantitative assessment of damage to reservoir sensitivity was conducted.The results show that the reservoir is medium/fine grain feldspar sandstone,the cementation types are membrane and pore type.The main pore types are intergranular pore,followed by intragranular pore,mold pore and feldspar dissolved pore.Chang 2 reservoir has no velocity sensitivity,medium to strong water sensitivity,strong salt sensitivity,weak acid sensitivity and no alkali sensitivity.Chang 6 reservoir is weak to medium to strong water sensitivity,no salt sensitivity,acid sensitive degree is improved-strong acid sensitivity,alkali sensitive degree is no-medium to weak alkali sensitivity.The research results provide a theoretical basis for the development of reasonable reservoir protection technology countermeasures in the study area.

关 键 词：杏子川油田 岩石学特征 敏感性损害 孔隙 

分 类 号：P618.13[天文地球—矿床学]